Checkout Procedures - Maytag MMV6178AAB Service Manual

COMPONENTS
RELAY 8
RELAY 10,11
NOTES:
• A MICROWAVE ENERGY TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR
ANY REASON.
• MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION.
• WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE CONNECTOR, NOT
THE WIRES.
B. CHECKOUT PROCEDURES
(1) CHECKOUT PROCEDURES FOR FUSE BLOWING
CAUTION: REPLACE BLOWN FUSE WITH 20 AMPERE FUSE.
Fuse blows immediately after
the door is closed.
Fuse blows immediately after
the door is opened.
Fuse blows when the door is closed and START
key is touched.
NOTES:
• If the fuse is blown by an improper switch operation, replace the all Interlock switches, PCB Ass'y and the
fuse at the same time. After replacing the the all Interlock switches, PCB Ass'y, Fuse with new ones, make
sure that they are correctly connected.
• Check for microwave energy leakage according to INTERLOCK ADJUSTMENT PROCEDURES on page 7-
12 when the primary interlock, secondary interlock switches and/or the interlock monitor switches are
adjusted or replaced.
TEST PROCEDURES
1. Measure continuity.
(ohm meter scale: Rx1)
2. Remove the lead wires and operate
oven at power level 1 through power
level 10.
1. Measure continuity.
(ohm meter scale: Rx1)
2. Remove the lead wires
and operate oven at
Convection Cooking.
PROBLEMS
POWER
LEVEL
1
2
3
4
5
6
7
8
9
10
Convection
Cooking Start
Improper operation of the primary interlock, secondary
interlock switches and/or the interlock monitor switch.
Malfunction of the high voltage transformer; the high
voltage capacitor including the diode, the magnetron,
the blower motor or the circuit board.
7-19
RESULTS
4 sec 18 sec
6 sec 16 sec
8 sec 14 sec
10 sec 12 sec
12 sec 10 sec
14 sec 8 sec
16 sec 6 sec
18 sec 4 sec
20 sec 2 sec
22 sec
OFF
CAUSES
0